Driving belt or chain.



F. W. CAIVIP.

DRIVING BELT 0H CHAIN. APPLICATloN HLED DEc.14. |912.

1,25%, 9., Patented Jan. 22,1918.

e, hens i, 2 which me FEREST CAMP, 0l? GLENELLYN, .'llLLIlOi DRXVHIG BELT Dit?, GEMM.

Specification of Letters latent tenesse,

implication tiled Deeemhee tl, 3.9m.

cient weight to give the desited ttection smell sheaves, even when the letter ete ei"- anged close togethei, end which shell peim 'mit of needy ienewel ot the ponts subjected to the ran-ost weet. ln the eccoiripenyinEa drawings l have illustceted one embodiment ol the invention which l have worked out in practice end which has importent advantages fiom. many viewpoints.` lt is to he understood, howevei, thet the invention. is susceptible of being m"ihodied in various othei torina Refers og to the dicwings,

v liguire l is e sieTJ elevation of the pie tened forni et delving belt oi" chain, the seine losing shown connection with sheeve pulley;

2 is o centiel, ttensvese, sectional elevation through one of the blocks or units of which the belt is composed;

Fig; 3 is e bottoni, 'plan View of' one oli seid units; f

Fig. 4l is e perspective view showing the method of essemblins; e enit; sind Figc 5 is e, centnfn, longitudinal, sectional elevation ot two adjacent blocks connected by e modified form. oit linlz.

\ rThe disiving belt niede up ci? seties wedge-shaped bodies on units, each oit which consists ot e paie et 'nell inteitting ineinloe constructed in any convenient nient-ei which :tney essunie various terms., if" n exemple, they' tney he mede ot solid blcchs ot lion ci* othef suitable materiel, although l do not intend to limit y mysell hy any ineens to e solid construction.,

Seid nnits one connected by shoit links l et res: instel, preferably spi-ting' steel en suitehle equivalent ineteifiel. The linlts' may lieve then onpcsite ends connected to seid units veiious ways @ne method 'is enlarge ence hy sollies the The objects of niy inven .wherehy vsolojeeted 1eepeotedly 'Wit Patented dem 2323, lltllld@ serial no. teens.

metal to tonni aj shouldei' which, etten he ing'attened down somewhat, lits within e i'ecess between the blocls l, 2 and is clamped blocks eie clamped together, e, suitable ence is piovided et opposite sides seid projection o, constituting t peli" o cggenings within which the enle ged ends ft the links 3 pct tions lieve the furthe? lunction ci locking tee two hlocks against teletiv'e notation, should the scouting holt become f loosened, where e bolt is used. links tney also he constttucted with shoul'n dees 8 shown in 5, seid integiel shoulders lacing fortified hy inillin, wey the .metal to iieduce the thickness ot the linlt to the desired point, leaving the end e ments They moy else he consti yeiious oth-et ways.,

When the je site are assembled in th menneid the heit tends to stieigh out, due t the tact that each lin clamped opposite ends in to the we l e hloclts. heet hy loe. ting the individuel st ln orden seid links nitty bend the adjacentlzaces 9 l@ ci l ond 2 4nesj;ectively one curved ci founded, whereby 'il-lering; opening is provided. These rounded pottions have radins is pretely slightly less than the ifedius oi he smallest sheeve y the helt in y he used. lf the c en the sheeve is known in advance the tztdius ot seid wounded jooiftions is pi" l'emhly slightly stoned seid smooth,

Vf. singles. .t Y is also selected with oi bendin een elastic limit of the nieteh s belt alt-toys hendennen pas ing cvei" the usually made long enough to have some slack, whereby it generally sags considerably in its upper span, causing the links to bend in the opposite direction, whereby the provision of the rounded .shoulders 9 on the outer blocks is also essential. These rounded shoulders have the effect of preventing breakage and prolong the life of the belt to a very marked degree.

It will be seen that each link is clamped between the adjacent blocks its full effective width, thereby rendering available the full tensile strength of the metal for any given section thereof. Furthermore, the enlargement 4 is clamped firmly so that there is no pivoting or turning thereof within the inclosing recess and accordingly there is no wear whatever due to friction.

The combined blocks l and 2 have tapering sides thereby forming a wedge-shaped block or element, as shown in Fig. 2. The converging walls of the block are adapted to lit within the correspondingly shaped converging walls of the sheave or pulley 11 and exert a wedging effect therein. ln order to increase the frictional engagement and hence the traction I provide for each element a strip of fabric l2 which is preferably made of canvas, although various other materials are suitable for this purpose. Said fabric 1s pressed up against the converging walls of the block when the latter is wedged in the sheave, as shown in Fig. 2. At other times the fabric remains bent up against said walls, although, when first applied, it spreads out to about the position shown in dotted lines in said figure. The fabric is held to the narrow end of the wedge by a strip of metal 13 which is preferably secured to the block 2 by the same bolt or rivet which secures said block to its mate. The opposite ends of the metal strip are bent over to grip the fabric stri approximately at the middle thereof. he metal employed for this purpose is preferably mild steel, although other metals are suitable. Said strip may be very readily replaced, when it becomes worn, by simply bending outwardly the extremities of the metal clip 12, removing said strip of fabric, inserting a new one and bending said extremities back into place.

The tensile strength of a driving belt made in the manner described, is very high. Such 4a belt is also sufficiently flexible to enable it to conform readily to the curve corresponding to the effective diameter of the sheave even when the latter is of small diameter, and the weight of the individual units aids in securing the desired friction or traction with the sheaves.

it is to be understood, of course, that the aaaaeee sired ends wherever such means fall within' the scope of said claims.

What I claim is Y l. A. driving belt, comprising a series of friction elements having'ilaring openings on opposite sides thereof, and short spans of metal ribbon connecting said elements and received within said openings, whereby the walls of said openings insure the bending of said metal to a curve of the'proper radius when said belt is flexed.

2. In a driving belt, a series of wedgeshaped members flexibly connected together and each comprising a plurality of detachable parts, a securing element, a. strip of fabric arranged with its middle portion at the narrow end of each wedge-shaped member, whereby a fabric covering is provided for each wedging face thereof to provide a friction surface therefor, and means for securing said middle portion to said end, said means permitting said fabric to be removed from said member without detaching the parts of the latter.

8. In a driving belt, a resilient metal link having an enlargement at each end, in cornbination with wedge-shaped elements havlng recesses on opposite sides within certain of which said enlargements are clamped.

4. in a device of the-class described, a link for a driving belt consisting of a piece of spring steel ribbon having opposite ends folded over to form enlarged extremities of the full edective Width of said ribbon.

5. lin a driving belt, a two-piece wedging element, one piece having a projection fitting loosely Within a recess in said other piece, whereby a clearance is provided on each side of said projection.

6. A driving belt comprising friction elements and individual links of flexible metal connecting said elements, lsaid elements having curved portions constituting forms over which said links may be bent to the desired radius when said belt is being flexed.

In witness whereof, I hereunto subscribe my name this 12th day of December, A. D.,

FRREST WM. CAMP. Witnesses:

ALFRED H. MOORE, MCCLELLAN Yonne.

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